Bed-plate motion for printing-presses.



19143.21;NTEDl JUNE 52,1903.

v Y JL A.- SVENSSOBL l l' BED PLATE MOTION POR PRINTING PRESSESf APPLICATION FILED APR. 1B, 1902..

10.730,174. l l PATENTE-135111152,1993.5

1J. A. svNssoN. BED PLATE MOTION EUR PRINTING'PRBSSES.

'APPLICATION FILED APR. 18,1902. Y

N0 MODEL. Y l 2 SHEETS-SHEET 2.

L-WM

l UNITED 'STATES Patenten June 2, 1903.

; PATENT OFFICE.

BED-PLATE MOTION FOR PRINTING-PRESSES.

SPECIFICATION'formng part of Letters Patent No. 7 30,174, dated J' une 2, 19GB.

Application {iled April 1.8, 1902A.

. reciprocating bed-motions for roller printingpresses; and the object of the same is to construct a simpleand efficient deviceiof this character which will reverse the bed by positive movement.

The novel construction used by me in carrying out my invention is fully described in this specification and claimed and illustrated in the accompanying drawings, forming a the cross.

part thereof, in which- Figure lis a longitudinal sectionon the line 1 1, Fig. 2. Fig. 2 is a transverse section on the line 2 2, Fig. 1.- Fig. 3 is a detail of Fig. 4 is a detail of a toggle. Fig.l 5 is a detail elevation of one abutment and the cross. Fig. 6 is a det-ail plan of the catch and cross.

Like numerals of reference designate like parts in the dierent views of theI drawings. MyA press issupported on twoparallel side frames l of appropriate shape. A horizontal bed 2 is mounted' on rollers g3, journaled on stud-shafts 4, seated inthe apertures-in the frames 1. Mounted on the upper surface of the bed 2 and on each side thereof is a'rack` bar 5, which extends about two-thirds of the length of the bed. An impression-cylinder 6v is mounted transversely the, frames -1 and bears two gears 7, located tomesh with the racks 5 to drive the bed'2. The cylinder 6 is keyed on a shaft 8, which is j ournaled in bearings 9, carried by vertical slides -10',-mounted.in guides 11, formed in the frames 1; Means for operating the slides to raise the cylinder 6 to raise the gear 7 clear of the racks 5 is provided by a pair of toggles 13, operated by cams 14. There `are two pairs of the toggles 13, one pair on each side of the machine. The upper toggles 13a are pivoted to the frames 1, while the lower toggles 13b are pivoted to ears 10", formed on the slides 10. Rollers 15 are journaled on said shaft.

shaft 17 and meshes with a smaller gear 21,

sein No. 103.611. (No model.)

vthe hinge-pins 16, which couple' the toggles 13 together, and these rollers 15 are located t0' be' engaged by thebefore-mentioned cams 1 14, which -are carried bya shaft 17, journaled inbearings 18, -carried by the slides 10. En-

larged apertures 19 permit a vertical move- `ment of'the shaft 17.

By the above -described arrangement the ,slides 10 are reciprocated at every revolution of the shaft 17 and retain their elevated position yduring about one-half of the period of revolution of A large gear 20 is keyed on the which meshes in turn with a gear 22,- which meshes with a gear 23, keyed on the cylindershaft 8. The gears 21 and 22 are carried by stud-shafts 24 and 25, respec1ively,which -are rigidly mounted iu the slide l0. It is easily seen that the motion of the shaft 17 is communicated to the cylinder 6, which in turn drives the bed 2 through the medium of the gears 7 and racks 5.

To drive the bed 2 while the gears 7 are dis,- engaged, a gear 26 is located beneath the bed 2 and'in position to engage a rack 27, rigidly mounted on the'bed. .The gear 26 is keyed on a shaft 28, journaled in boxes29? and 30, carried by bracket-arms 29 and 30, re'spec tivelyx- The arms 29=and 30 are secured to a j cross-bar 3l, connecting the two slides 10 and constructed to move in unison therewith. The rack 27 does not extend the whole length "of the bed 2, but spaces 32'intervene between the ends of the bed and the ends oftherack. Keyed on the end' of the shaft 28 is a disk 33, bearing a crank-pin' 34, which bears a sliding rectangular vblock 35, which is slidingly vertical arms 37 of a cross 38. The cross 38 comprises the vertical arms 37 and two horizontalarms 39, which are slidingly mounted mountedin parallel guides 36, formed on the carried by the abutments 43. The catches 45 have rounded 'heads 45b and rounded noses carrying rollers 45a to adapt them to ride over the lugs 44. A stop 46 is carried bythe guides 40 and serves to hold the catch down to prevent its releasing its hold on the lug 44 until either one of the gears 7 or 26 engages its respective rack 5 or 27 and drives the bed.

In operation the shaft 17 is driven from some source of power. This motion will be communicated to the cylinder 6 through the intermediate gearing carried by the slide 10. When the press is iu the position shown in Fig. 1, the toggles 13 are straightened out, the slides 10 are in their lowermost position, and the gears 7 are in engagement with the racks 5. The bed 2 will then be traveling toward the left and will continue to do so until the gears 7 clear the ends of the racks 5. When this position has been reached, the upper arm 37 of the cross 38 will be in contact with the right-hand abutment 43 andthe catch 45 thereon will be in engagement with the corresponding lug 44. The gears are so proportioned and the crank-pin 34 so located that itis nowin its lowermost position. The movement of the crank-pin 34 communicated to the cross 38 now controls the movement of the bed 2 and Will continue to do so for onehalf revolution of the crank-shaft--that is, until the crank reaches its highest position. During this one-halt' revolution of the crankpin the stop 46 prevents catch 45 from releasing its hold, and thus locks cross 3S and bed 2 together. Also during the before-mentioned one-half revolution of the crank-shaft the cam 14 and toggles 13 operate the slides 10 and raise the gear 26, so it can engage rack 27. The gear 26 now drives the bed 2 for one complete revolution. The crank-pin 34 is now again at its highest position and assumes control of the bed for another halfrevolution. During this one-half revolution the cylinder is again lowered and gear 7 engages rack 5, when the cycle will be repeated. The shape of the nose on the catch 45 allows it to be pulled over the lug 44 when the roller 45b is clear of the stop 46, and thus release its hold of the cross 38.

I do not wish to-be limited as to details of construction, as these may be modified in many particulars without departing from the spirit of my invention.

Having thus described my invention, what I claim as new, and for 'which I desire to secure Letters Patent, is

1. In a bed-motion for printing-presses, the combination with a bed mounted to be reciprocated and bearing a rack, of vertical slides mounted in the frame of the press, a crankshaft journaled in said slides, a cross bearing guides engaged by the crank-pin on said crank-shaft, said cross being mounted to be reci p rocated by said crank to engage said bed to reverse its movement, a gear mounted on said shaft and located to be brought into engagement with said rack, and means for operating said slides to bring said gear into engagement with said rack and to disengage it therefrom, substantially as described.

2. In a bed-motion for printing-presses, the combination With a bed mounted to be reciprocated, of vertical slides, an impression-cylinder journaled in said slides and bearing a gear, a rack mounted on said bed and located to be engaged by said gear, a shaft journaled in said slides and bearing a gear, a rack mounted on said bed and located to be engaged by said last-mentioned gear, and means for intermittently operating said slides, substantially as described.

3. In a bed-motion for printing-presses, the combination with a bed mounted to be reciprocated, of a rack mounted on the upper side of said bed, an impression-cylinder carrying a gear located to be thrown into mesh with said rack, slides mounted in guides and supporting said impression cylinder, a crankshaft bearing a gear, and supported by said slides, a rack mounted on the under side of said bed and in position to be engaged by said last-men tioned gear, abutments mounted on the ends of said bed, a cross mounted in guides and positioned to engage said abutments, and means for operating said slides, substantially as described.

4. In a bed-motion for printing-presses, the combination with a bed mounted to be reciprocated, a rack mounted on the under side of said bed, a rack mounted on the upper side of said bed, vertical slides, means for operating said slides, an impression cylinder mounted in said slides and bearing a gear located to mesh with said rack mounted on the upper side of said bed, a shaft carried by said slides and bearing a crank and a gear located to mesh with said irst-mentionedrack, a slidingly-mounted cross engaged by said crank to drive said cross to reverse said bed, and means for driving said shaft, substantially as described.

5. In a bed-motion for printing-presses, the combination with a bed mounted to be reciprocated, a rack mounted on the upper side of said bed, a rack mounted on the under side of said bed, vertical slides, an impression-cylinder carried by said slide and bearing a gear, a crank-shaft carried by said slides and bearing a gear, means for intermittently operating said slides to engage said gears and said racks, means for driving said impression-cylinder and said shaft, and means for reversing said bed which means is operated by said crank, substantially as described.

6. In a bed-motion for printing-presses, the combination with a bed mounted to be reciprocated, a rack mounted on the under side of said bed, vertical slides mounted to be moved in unison, a shaft bearing a crank and gear, said shaft being carried by said slides, a cross IOO mounted to be reoproeated and having guides l formed therein which are engaged by said crank, means for operating said slides to engage and disengage said rack and said gear, and means for driving said gear to drive said bed andto reciprocate saidcross to reverse the motion of said bed, substantially as described.

In testimony whereof .I have hereunto'set my hand in presence of twosubscribing wit# Io nesses.

JOHAN ALFRED SVENSSON.

Witnesses: C. T. SNYDER, L. L. BURKET. 

